Mackerel

Dear Sir,
What are the difference between Mackerel and Jack Mackerel. Are they both from the same species?
Thanks!

The Jack Mackerel is more appropriately called the Mackerel Jack because it is a jack, not a mackerel. There are many species in the mackerel family, including the Wahoo, tunnies, tunas, bonitos, mackerels, and Albacore.